Screen for screening or sifting sand, gravel, stone, and other matters.



. E. NEW. SCREEN FOR SCREENING OR SIFTING SAND, GRAVEL, STONE, AND OTHERMATTERS.

APPLICATION FILED DBO. 9, 1911.

1,025,290. Patented May '7, 1 912.

TTQJIj UNITED STATES PATENT OFFICE.

EDWARD NEW, OF HAMILTON, ONTARIO, CANADA.

SCREEN FOR SCREENING OR SIFTING SAND, GRAVEL, STONE, AND OTHER MATTERS.

Specification of Letters Patent.

Patented May '7, 1912.

Application filed December 9, 1911. Serial No. 664,706.

T 0 all whom it may concern:

Be it known that I, EDWARD NEW, a subject of the King of Great Britain,and resident of Hamilton, in the county of entworth and Province ofOntario, Canada, have invented new and useful Improvements in Screensfor Screening or Sifting Sand, Gravel, Stone, and other Matters, ofwhich the following is a specification.

My invention relates to a screen loosely suspended at an angle, orincline, and adapted to swing or oscillate sidewise, and means to causethe upper part of the screen to adruptly stop, at or about thetermination of each swing, and means to cause the lowerpart of thescreen to simultaneously swing in an opposite direction.

The ob ects of my invention are first, to

provide an inclined screen adapted to swing,

or oscillate, and to jar in such a manner that the fine parts of thesand and gravel shall be loosened from the coarse parts thereof, andthereby screened, second, to provide a screen, the upper portion ofwhich is adapted to swing transversely, and the lower portion to swingsimultaneously therewith in opposite directions; third, to provide ascreen comprising sections of different fineness and coarseness ofwire-mesh, and adapted to screen different grades of sand, gravel andstone through said sections; fourth, to pro vide a screen adapted tooscillate and to be suddenly restricted in its motion thereby causingthe same to jar, or bump, at a predetermined position of the travel ofthe screen, thereby loosening the material being screened and causingrapid disintegration of said material.

I attain these objects by the mechanism illustrated in the accompanyingdrawing in which Figure 1 is a face elevation of the screen, looselysuspended from framework, the lower portion of the screen beingpivotally connected to said framework and with means for swinging, oroscillating the screen. Fig. 2 is a sectional side elevation of thescreen, in an inclined position, showing the oscillating center.

Similar characters of reference refer to similar parts throughout theseveral views.

In the drawing the removable screen is illdicated by 2, and is madepreferably in three sections of wire screen varying in mesh, forinstance, fine, intermediate and coarse respectively, the fine sectionbeing the upper one, all of which fit snugly in a suitable frame 3, andwhich may be removed when worn out, and replaced by new ones,

- in said frame.

of the two chains, as shown, but if one central chain were preferred theend of rod 9 would be connected therewith.

It will be noticed in Fig. 2, that the screen frame is suspended at anincline or angle in order that a portion of the material loaded ordumped therein for screening purposes, may roll down, and consequentlyfall from off the open lower end thereof.

6, is a rigid transverse bar, of the framework 4, or other suitableblock, adapted to receive a pivotal pin 7 which extends from the rearside of the screen-frame, said pivot is adapted to oscillate in saidtransverse bar or block.

8 is a transverse bar, or rod, which connects the chains 5 together, and9 is a connecting rod pivotally connected to the bar 8. The opposite endof said rod is j ournaled to the disk 10 by means of its eccentric pin12. The disk is secured on its concentric shaft 13, which is journaledin the suitable framework 4, in the usual manner of journals andstationary bearings for shafts. The disk 10 may be rotated by means of abelt 15, or by any well known means for to tating a shaft, and pulleys.The disk 10, has holes 11, at varying distances from its concentricshaft 13, adapted to receive the eccentric pin 12, of the disk to allowthe connecting rod 9, to be connected thereto, thereby providing meansto allow more or less throw, or stroke, to the rod 9, hence more or lessoscillation to the screen frame.

16 and 16 are rigid stopblocks, preferably of wood, and are adapted toallow the ends of the upper part of the screen-frame to jar or bumpabruptly and alternately against said blocks, at each stroke of theconnecting rod 9, in order that said jar shall be sudden, abrupt andpronounced. The flexibility of the suspended chains 5, afiord means toallow the bump of the screen frame, against the blocks 16, at eachstroke of the reciproeating bar 8, and the connecting rod 9. Thejarring, or bumping, of the upper end of the screen frame is animportant feature in this invention, for the reason, that the materialto be screened and which is dumped in the upper end part of the screenframe can be more readily disintegrated and screened, than couldotherwise be accomplished.

It will be noticed that the lower end of the screen-frame oscillatessimultaneously with the upper end part thereof, and in oppositedirections, and said lower end partmay have more or less correspondingoscillation, depending on the positions of the pivot 7.

I prefer to locate the pivot 7, at about two-thirds distance of thelength of the screen-frame, measuring from the top thereof. Thetwo-third distance, referred to, has been practically tested with goodresults, though said location of the pivotal center 7, may be higher orlower, to cause more or less vibration to different portions of thescreen. Bins to receive the varying grades of sand may be placed underthe screen, and immediately opposite the respective fine and coarsesect-ions of screens, as set forth.

lVhat I claim as my invention and desire to secure by Letters Patent, is

1. In a screen of the character described, a stationary frame, aninclined screen, or

' sifter, chains connected to said frame and to the upper parts of thescreen to suspend the same, a transverse bar connecting said chains,reciprocating means pivotally connected to said bar adapted to vibratethe screen transversely thereto, and rigid blocks on said frame adaptedto receive the upper and opposite parts of the screen to cause an abruptjar to the same.

2. In a screen of the character described, a stationary frame, aninclined screen, flexible means connected to the frame and to the screento suspend said screen, a transverse bar connecting said flexible meanstogether, means connected to said bar adapted to reciprocate the same,thereby vibrating the screen, and means on the frame adapted to allowthe screen to jar therewith at each stroke of the reciprocating means,thereby loosening the material in the screen.

3. In a screen of the character described, a stationary frame, aninclined screen, means on the lower and rear part of the screen and onthe frame, adapted to allow the screen to oscillate thereon, flexiblemeans connected to the frame and to the upper portion of the screen, atransverse bar connecting said flexible means, reciprocating meansconnected to said bar adapted to oscillate the screen, and therebyloosen the material therein.

4. In a screen of the character described, a stationary frame, aninclined screen, means on the lower rear portion of the screen, and onthe frame, adapted to allow the screen to oscillate thereon, flexiblemeans connecting the upper part of the screen with the frame, meansconnected to said flexible means adapted to vibrate and oscillate thescreen and stationary means on the frame at a predetermined distancefrom the screen, adapted to contact with the upper part of the screen tobump and jar the same.

5. In a screen of the character described, a stationary framework, aninclined screenframe, removable sections of screens therein, means onthe underside of the screen frame and on the framework to support thescreen-frame and to allow the same to oscillate, suspending meansconnected to the screen-frame and to the frame work, reciprocating meansconnected to said suspending means adapted to oscillate the screenframe,and means on the stationary framework adapted to receive thescreen-frame at or near the terminus of its oscillatory motion, therebycausing abrupt jars to the screen-frame.

6. In a screen of the character described, a stationary frame, aninclined screen, means on the lower and rear part of the screen and onthe frame adapted to allow the screen to oscillate thereon in oppositetransverse directions, flexible means loosely connected to the frame andto the upper part of the screen, reciprocating means connected to saidflexible means adapted to oscillate the screen in opposite transversedirections to predetermined distances, and to cause abrupt terminationof the oscillatory movement of the screen, thereby loosening and siftingthe material in the screen.

EDWARD NEIV. Witnesses JOHN H. HENDRY, RICHARD BUTLER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

